A channel has a bit rate of $8$ kbps and a propagation delay of $10$ msec. Find what range of frame sizes does stop$-$and$-$wait ARQ give an efficiency

remedies to the following problems in view of at least $70$ percent? Discuss the of go$-$back$-$n ARQ: $($i$)$ Errors in data frames,

$($ii$)$ Errors$/$delays in acknowledgements and $($iii$)$ Short data frames and long ack frames